It does make it harder tho.
Zoro has got A LOT of screen time in Wano already. Oda gave him his own plotline alone during act 2, despite showing up alongside Luffy on act 1, and now on the Raid he gave Zoro the rooftop along the other 4, and now he will get healed to do something else, so if Oda gives Zoro King too, it's starting to look pretty hard Zoro will have more time left to go after Kaido before the arc ends.